7
7-14
7-5 Brake Interlock
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
Applied Functions
Operation Timing
This section shows the timing of the Brake Interlock Output (BKIR).
Basic Timing
Servo ON/OFF Operation Timing When Motor Is Stopped
*1. The servo does not turn ON until the motor rotation speed drops to approx. 30 r/min or below.
*2. The operation of the dynamic brake when the servo is OFF depends on the setting of the Disable operation option
code (605C hex).
*3. The Brake Interlock Output (BKIR) signal is output either when a release request command is received via Servo
controls or when a release request command is received via EtherCAT communications. The above example shows
when there is no brake release request from EtherCAT communications. The BKIR is assigned to the general-
purpose output (CN1).
Note: The brake application time and release time vary depending on the Servomotor brake. For details, refer to 3-3
Servomotor Specifications on page 3-32.
ON
OFF
ON
OFF
ON
OFF
OFF ON
Servo ON/OFF
Brake Interlock
Output (BKIR)
Servo OFF Servo ON Servo OFF
Request to release brake
Forced-braking is possible. Forced-braking is possible.
Control power supply
(L1C and L2C)
Servo ON/OFF
ON
OFF
Dynamic brake relay
ON
OFF
Motor power supply
ON
OFF
ON
OFF
Approx. 2 ms
Approx. 4 ms 1 to 6 ms
Approx. 60 ms
Brake interlock
output (BKIR)
*3
Released
Held
Attraction time
Release time
Servo OFF Servo OFFServo ON
*1
DB engaged
*1
DB engaged
*2
DB released
Power supplyNo power supply
No power supply
3437 hex
Release request
Holding brake operation
Brake released
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